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When 1.0 kg of coal is burned, about 3.0 x 107 J of energy is released. If the energy released per 92U235 fission is 200 MeV, how many kilograms of coal must be burned to produce the same energy as 0.79 kg of 92U235?
A person who weighs 715 N is riding a 98-N mountain bike. Suppose the entire weight of the rider and bike is supported equally by the two tires. find the area of contact between each tire and the ground
What is the acceleration of a 1.00 gram drop of blood in the finger tips at the bottom of the swing? Find out force that the blood vessel must exert on the drop of blood in part (a)
A jet airplane flying from Darwin, Australia, has an air speed of 250 m/s in a direction 5.0° south of west. What is the magnitude of the velocity relative to earth
The absolute uncertainty written in the form
A 250g ice cube at -10?C is placed in an aluminum cup whose initial temperature is 70?C. The system comes to an equilibrium temperature of 20?C
(a) How tall is the lamp's image if the lamp is a distance of 39.6 cm from the mirror (include sign if negative)? (b) How tall is the lamp's image if the lamp is a distance of 85.8 cm from mirror (include sign if negative)?(c) How tall is the lamp..
The temperature near the surface of the earth is 310 K. A xenon atom (atomic mass = 131.29 u) has a kinetic energy equal to the average translational kinetic energy, how high up would it go before coming to rest
The threshold or cut-off frequency for sodium is 4,40x10 14 hz. Calculate the wave length of the electrons ejected from the surface
A Carnot engine works between two heat reservoirs at temperatures Thot= 314.0 K and Tcold= 225.0 K. What is its efficiency? How much heat does it reject during each cycle
A doubly charged ion is accelerated to an energy of 30.0 keV by the electric field between two parallel conducting plates separated by 1.50 cm
A home run is hit such a way that the baseball just clears a wall 23 m high located 113 m from home plate. How much time does it take for the ball to reach the wall
A person pushes a 13.6-kg shopping cart at a constant velocity for a distance of 33.1 m on a flat horizontal surface. find the magnitude of the force that the shopper exerts
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